IEEE DRAFT C57.12.00 : D4 98
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
DRAFT STANDARD GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
11-09-2023
01-12-2013
1. Overview
1.1 Scope
1.2 Word Usage
2. Terminology
3. Definitions
4. Service conditions
4.1 Usual service conditions
4.2 Loading at other than rated conditions
4.3 Unusual service conditions
5. Rating data
5.1 Cooling classes of transformers
5.2 Frequency
5.3 Phases
5.4 Rated kilovoltamperes
5.5 Voltage ratings and taps
5.6 Connections
5.7 Polarity, angular displacement, and terminal markings
5.8 Impedance
5.9 Total losses
5.10 Insulation levels
5.11 Temperature rise and loading conditions
5.12 Nameplates
6. Construction
6.1 Bushings
6.2 Transformer Accessories
6.3 Bushing current transformers
6.4 Thermometer Wells
6.5 Tank pressure requirements
6.6 Liquid insulation system
6.7 Grounding
6.8 Minimum external clearances between transformer live
parts of different phases of the same voltage
7. Short circuit characteristics
7.1 Requirements
7.2 Components
7.3 Base kilovoltamperes
7.4 Calcuation of winding temperature during a short circuit
8. Testing and Calculations
8.1 General
8.2 Routine, Design, and Other Tests for Transformers
8.3 Additional Routine Tests on Transformers with load
tap changing or regulating transformers
8.4 Determination of transformer regulation
9. Tolerances
9.1 Tolerances for Ratio
9.2 Tolerances for Impedance
9.3 Tolerances for Losses
9.4 Accuracies Required for Measuring Losses
10 Connection of Transformers for Shipment
Annex A Bibliography
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